Results 71 to 80 of about 15,879 (217)

Stellar intensity interferometry: Experimental steps toward long-baseline observations

, 2010
Experiments are in progress to prepare for intensity interferometry with arrays of air Cherenkov telescopes. At the Bonneville Seabase site, near Salt Lake City, a testbed observatory has been set up with two 3-m air Cherenkov telescopes on a 23-m ...
Adams, Ben, Bond, Isobel, Bradbury, Stella, Dravins, Dainis, Jensen, Hannes, Kieda, David B., Kress, Derrick, LeBohec, Stephan, Munford, Edward, Nunez, Paul D., Price, Ryan, Ribak, Erez, Rose, Joachim, Simpson, Harold, Smith, Jeremy   +14 more
core   +1 more source

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Accuracy of swept-source optical coherence tomography based biometry for intraocular lens power calculation: a retrospective cross–sectional study

BMC Ophthalmology, 2019
Background To evaluate the accuracy of biometric measurements by a swept-source optical coherence tomography (SS–OCT) based biometry for intraocular lens (IOL) power calculation.
Youngju An, Eun-Kyoung Kang, Hyojin Kim, Min-Ji Kang, Yong-Soo Byun, Choun-Ki Joo   +5 more
doaj   +1 more source

Towards controlled Fizeau observations with the Large Binocular Telescope

, 2018
The Large Binocular Telescope Interferometer (LBTI) can perform Fizeau interferometry in the focal plane, which accesses spatial information out to the LBT's full 22.7-m edge-to-edge baseline.
Defrere, Elmegreen, Hill, Hill, Hinz, Hinz, Hoffmann, Maier, McCarthy, Wagner, Woolf   +10 more
core   +1 more source

Eye shape and retinal shape, and their relation to peripheral refraction [PDF]

, 2012
Purpose: We provide an account of the relationships between eye shape, retinal shape and peripheral refraction. Recent findings: We discuss how eye and retinal shapes may be described as conicoids, and we describe an axis and section reference system for
Atchison, David, Mallen, Edward, Mathur, Ankit, Pope, James, Verkicharla, Pavan   +4 more
core   +2 more sources

Quantitative Stain Mapping in X‐Ray Virtual Histology

Advanced Science, EarlyView.
Virtual histology promises 3D tissue examination without physical sectioning, yet has lacked the tissue‐specificity of conventional pathology. This work demonstrates the first quantitative three‐dimensional stain mapping at histologically relevant resolution, separating contrast agent from tissue to reveal cellular features such as nuclei. The approach
Dominik John, David M. Paganin, Marie‐Christine Zdora, Lisa Marie Petzold, Patrick Ilg, Junan Chen, Sara Baggio, Johannes B. Thalhammer, Sami Wirtensohn, Julian Moosmann, Jörg U. Hammel, Felix Beckmann, Samantha J. Alloo, Jannis N. Ahlers, Madleen Busse, Julia Herzen, Kaye S. Morgan   +16 more
wiley   +1 more source

Repeatability of Corneal Aberrations and Ocular Biometry Measurements Using the Pentacam® AXL: A Cross-sectional Study [PDF]

Journal of Clinical and Diagnostic Research
Introduction: Accurate assessment of ocular biometry and corneal aberrations for diagnosis and therapy is crucial in many clinical settings. Devices to improve the measurements of these parameters are constantly being developed.
Meznah S almutairi, Basal H altoaimi, Rania Fahmy, Shatha I Algowaifly, May S Alenazi   +4 more
doaj   +1 more source

Hanbury Brown-Twiss interferometry and second-order correlations of inflaton quanta

, 2010
The quantum theory of optical coherence is applied to the scrutiny of the statistical properties of the relic inflaton quanta. After adapting the description of the quantized scalar and tensor modes of the geometry to the analysis of intensity ...
A. Erdelyi, A. Perelomov, A. D. Sakharov, A. D. Sakharov, B. Jones, G. Baym, G. I. Kopylov, G. I. Kopylov, G. I. Kopylov, G. I. Kopylov, G. V. Chibisov, H. Jorgensen, J. Kapusta, J. Klauder, L. Mandel, M. Abramowitz, M. Giovannini, Massimo Giovannini, R. Loudon, R. A. Sunyaev, S. Karlin, S. Weinberg, V. F. Mukhanov, V. F. Mukhanov, V. N. Lukash, V. N. Lukash   +25 more
core   +1 more source

Exceptional Antimodes in Multi‐Drive Cavity Magnonics

Advanced Electronic Materials, EarlyView.
Driven‐dissipative cavity‐magnonics provides a flexible platform for engineering non‐Hermitian physics such as exceptional points. Here, using a four‐port, three‐mode system with controllable microwave interference, antimodes and coherent perfect extinction (CPE) are realized, enabling active tuning to antimode exceptional points.
Mawgan A. Smith, Ryan D. McKenzie, Alban Joseph, Robert L. Stamps, Rair Macêdo   +4 more
wiley   +1 more source

Combination of Time Series of L-, C-, and X-Band SAR Images for Land Cover and Crop Classification

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
The availability of new Earth observation satellites operating radar sensors at different frequencies enables the combination of multiple dimensions of the data (time, frequency, polarimetry, and interferometry) in many applications. Image classification
Mario Busquier, Juan M. Lopez-Sanchez, Francesca Ticconi, Nicolas Floury   +3 more
doaj   +1 more source